H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/52
H04Q 3/52 (2006.01) H03K 3/356 (2006.01) H03K 17/693 (2006.01)
Patent
CA 1296796
ABSTRACT OF THE DISCLOSURE In a crosspoint matrix, a plurality of column lines each comprise two signal conductors connected to difference outputs of differential line drivers which are connected by way of switch element pairs of transistors to row lines. Each of the row lines, likewise, comprises two signal conductors. The two signal outputs of a differential amplifier, having a trigger behavior, is connected to the two signal conductors of a respective row line. Each of the switch elements, fashioned with a switching transistor having this control electrode charged with a through- connect or an inhibit signal and having its main electrode connected to the matrix output line respectively comprises a pre- switch transistor forming a series circuit with the switching transistor. The preswitched transistor has its control electrode connected to the matrix input line and its main electrode facing away from the series circuit connected to ground by way of a sampling transistor. The respective matrix output conductor is connected to an operating potential by way of a precharging transistor. Precharging and sampling transistors are oppositely driven with the switching matrix network selection clock which sub-divides a bit through-connect time interval into a precharging phase and into an actual through-connect phase.
548550
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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